I've done a lot of googling and I can't for the life of me find any information about this audio input port in my center storage bin. There's nothing in the owner's manual either from what I can tell. I bought this car three months ago and just noticed this audio input when I was sorting through the pens I keep in the storage bin.

Here's my center console with the storage bin opened.


Here's the view into the storage bin.


And here's a close-up shot of the audio input.


I've tried cycling through every mode and pressing every button on the radio. How do I switch to aux/this audio input?

I've found the solution. It's aftermarket and tuning the radio to 87.9 FM allows aux playback. 88.3 FM is also common with this type of audio input.

Ah, FM modulator